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1 /* | 1 /* |
2 * Copyright (c) 2012 Google Inc. All rights reserved. | 2 * Copyright (c) 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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36 #include "hb-coretext.h" | 36 #include "hb-coretext.h" |
37 #endif | 37 #endif |
38 #include "SkPaint.h" | 38 #include "SkPaint.h" |
39 #include "SkPath.h" | 39 #include "SkPath.h" |
40 #include "SkPoint.h" | 40 #include "SkPoint.h" |
41 #include "SkRect.h" | 41 #include "SkRect.h" |
42 #include "SkTypeface.h" | 42 #include "SkTypeface.h" |
43 #include "platform/fonts/FontCache.h" | 43 #include "platform/fonts/FontCache.h" |
44 #include "platform/fonts/FontPlatformData.h" | 44 #include "platform/fonts/FontPlatformData.h" |
45 #include "platform/fonts/SimpleFontData.h" | 45 #include "platform/fonts/SimpleFontData.h" |
| 46 #include "platform/fonts/UnicodeRangeSet.h" |
46 #include "platform/fonts/shaping/HarfBuzzShaper.h" | 47 #include "platform/fonts/shaping/HarfBuzzShaper.h" |
47 #include "wtf/HashMap.h" | 48 #include "wtf/HashMap.h" |
48 #include "wtf/MathExtras.h" | 49 #include "wtf/MathExtras.h" |
49 | 50 |
50 namespace blink { | 51 namespace blink { |
51 | 52 |
52 const hb_tag_t HarfBuzzFace::vertTag = HB_TAG('v', 'e', 'r', 't'); | 53 const hb_tag_t HarfBuzzFace::vertTag = HB_TAG('v', 'e', 'r', 't'); |
53 | 54 |
54 // Though we have FontCache class, which provides the cache mechanism for | 55 // Though we have FontCache class, which provides the cache mechanism for |
55 // WebKit's font objects, we also need additional caching layer for HarfBuzz | 56 // WebKit's font objects, we also need additional caching layer for HarfBuzz |
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107 ASSERT(result.get()->value->refCount() > 1); | 108 ASSERT(result.get()->value->refCount() > 1); |
108 result.get()->value->deref(); | 109 result.get()->value->deref(); |
109 if (result.get()->value->refCount() == 1) | 110 if (result.get()->value->refCount() == 1) |
110 harfBuzzFaceCache()->remove(m_uniqueID); | 111 harfBuzzFaceCache()->remove(m_uniqueID); |
111 } | 112 } |
112 | 113 |
113 struct HarfBuzzFontData { | 114 struct HarfBuzzFontData { |
114 USING_FAST_MALLOC(HarfBuzzFontData); | 115 USING_FAST_MALLOC(HarfBuzzFontData); |
115 WTF_MAKE_NONCOPYABLE(HarfBuzzFontData); | 116 WTF_MAKE_NONCOPYABLE(HarfBuzzFontData); |
116 public: | 117 public: |
117 HarfBuzzFontData(WTF::HashMap<uint32_t, uint16_t>* glyphCacheForFaceCacheEnt
ry, hb_face_t* face, unsigned rangeFrom, unsigned rangeTo) | 118 HarfBuzzFontData(WTF::HashMap<uint32_t, uint16_t>* glyphCacheForFaceCacheEnt
ry, hb_face_t* face, PassRefPtr<UnicodeRangeSet> rangeSet) |
118 : m_glyphCacheForFaceCacheEntry(glyphCacheForFaceCacheEntry) | 119 : m_glyphCacheForFaceCacheEntry(glyphCacheForFaceCacheEntry) |
119 , m_face(face) | 120 , m_face(face) |
120 , m_hbOpenTypeFont(nullptr) | 121 , m_hbOpenTypeFont(nullptr) |
121 , m_rangeFrom(rangeFrom) | 122 , m_rangeSet(rangeSet) |
122 , m_rangeTo(rangeTo) | 123 { |
123 { } | 124 } |
124 | 125 |
125 ~HarfBuzzFontData() | 126 ~HarfBuzzFontData() |
126 { | 127 { |
127 if (m_hbOpenTypeFont) | 128 if (m_hbOpenTypeFont) |
128 hb_font_destroy(m_hbOpenTypeFont); | 129 hb_font_destroy(m_hbOpenTypeFont); |
129 } | 130 } |
130 | 131 |
131 SkPaint m_paint; | 132 SkPaint m_paint; |
132 RefPtr<SimpleFontData> m_simpleFontData; | 133 RefPtr<SimpleFontData> m_simpleFontData; |
133 WTF::HashMap<uint32_t, uint16_t>* m_glyphCacheForFaceCacheEntry; | 134 WTF::HashMap<uint32_t, uint16_t>* m_glyphCacheForFaceCacheEntry; |
134 hb_face_t* m_face; | 135 hb_face_t* m_face; |
135 hb_font_t* m_hbOpenTypeFont; | 136 hb_font_t* m_hbOpenTypeFont; |
136 unsigned m_rangeFrom; | 137 RefPtr<UnicodeRangeSet> m_rangeSet; |
137 unsigned m_rangeTo; | |
138 }; | 138 }; |
139 | 139 |
140 static hb_position_t SkiaScalarToHarfBuzzPosition(SkScalar value) | 140 static hb_position_t SkiaScalarToHarfBuzzPosition(SkScalar value) |
141 { | 141 { |
142 // We treat HarfBuzz hb_position_t as 16.16 fixed-point. | 142 // We treat HarfBuzz hb_position_t as 16.16 fixed-point. |
143 static const int kHbPosition1 = 1 << 16; | 143 static const int kHbPosition1 = 1 << 16; |
144 return clampTo<int>(value * kHbPosition1); | 144 return clampTo<int>(value * kHbPosition1); |
145 } | 145 } |
146 | 146 |
147 static void SkiaGetGlyphWidthAndExtents(SkPaint* paint, hb_codepoint_t codepoint
, hb_position_t* width, hb_glyph_extents_t* extents) | 147 static void SkiaGetGlyphWidthAndExtents(SkPaint* paint, hb_codepoint_t codepoint
, hb_position_t* width, hb_glyph_extents_t* extents) |
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177 | 177 |
178 #if !defined(HB_VERSION_ATLEAST) | 178 #if !defined(HB_VERSION_ATLEAST) |
179 #define HB_VERSION_ATLEAST(major, minor, micro) 0 | 179 #define HB_VERSION_ATLEAST(major, minor, micro) 0 |
180 #endif | 180 #endif |
181 | 181 |
182 static hb_bool_t harfBuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoin
t_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* user
Data) | 182 static hb_bool_t harfBuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoin
t_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* user
Data) |
183 { | 183 { |
184 HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData)
; | 184 HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData)
; |
185 | 185 |
186 RELEASE_ASSERT(hbFontData); | 186 RELEASE_ASSERT(hbFontData); |
187 if (unicode < hbFontData->m_rangeFrom || unicode > hbFontData->m_rangeTo) | 187 if (hbFontData->m_rangeSet && !hbFontData->m_rangeSet->contains(unicode)) |
188 return false; | 188 return false; |
189 | 189 |
190 if (variationSelector) { | 190 if (variationSelector) { |
191 #if !HB_VERSION_ATLEAST(0, 9, 28) | 191 #if !HB_VERSION_ATLEAST(0, 9, 28) |
192 return false; | 192 return false; |
193 #else | 193 #else |
194 // Skia does not support variation selectors, but hb does. | 194 // Skia does not support variation selectors, but hb does. |
195 // We're not fully ready to switch to hb-ot-font yet, | 195 // We're not fully ready to switch to hb-ot-font yet, |
196 // but are good enough to get glyph IDs for OpenType fonts. | 196 // but are good enough to get glyph IDs for OpenType fonts. |
197 if (!hbFontData->m_hbOpenTypeFont) { | 197 if (!hbFontData->m_hbOpenTypeFont) { |
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343 { | 343 { |
344 #if OS(MACOSX) | 344 #if OS(MACOSX) |
345 hb_face_t* face = hb_coretext_face_create(m_platformData->cgFont()); | 345 hb_face_t* face = hb_coretext_face_create(m_platformData->cgFont()); |
346 #else | 346 #else |
347 hb_face_t* face = hb_face_create_for_tables(harfBuzzSkiaGetTable, m_platform
Data->typeface(), 0); | 347 hb_face_t* face = hb_face_create_for_tables(harfBuzzSkiaGetTable, m_platform
Data->typeface(), 0); |
348 #endif | 348 #endif |
349 ASSERT(face); | 349 ASSERT(face); |
350 return face; | 350 return face; |
351 } | 351 } |
352 | 352 |
353 hb_font_t* HarfBuzzFace::createFont(unsigned rangeFrom, unsigned rangeTo) const | 353 hb_font_t* HarfBuzzFace::createFont(PassRefPtr<UnicodeRangeSet> rangeSet) const |
354 { | 354 { |
355 HarfBuzzFontData* hbFontData = new HarfBuzzFontData(m_glyphCacheForFaceCache
Entry, m_face, rangeFrom, rangeTo); | 355 HarfBuzzFontData* hbFontData = new HarfBuzzFontData(m_glyphCacheForFaceCache
Entry, m_face, rangeSet); |
356 m_platformData->setupPaint(&hbFontData->m_paint); | 356 m_platformData->setupPaint(&hbFontData->m_paint); |
357 hbFontData->m_simpleFontData = FontCache::fontCache()->fontDataFromFontPlatf
ormData(m_platformData); | 357 hbFontData->m_simpleFontData = FontCache::fontCache()->fontDataFromFontPlatf
ormData(m_platformData); |
358 ASSERT(hbFontData->m_simpleFontData); | 358 ASSERT(hbFontData->m_simpleFontData); |
359 hb_font_t* font = hb_font_create(m_face); | 359 hb_font_t* font = hb_font_create(m_face); |
360 hb_font_set_funcs(font, harfBuzzSkiaGetFontFuncs(), hbFontData, destroyHarfB
uzzFontData); | 360 hb_font_set_funcs(font, harfBuzzSkiaGetFontFuncs(), hbFontData, destroyHarfB
uzzFontData); |
361 float size = m_platformData->size(); | 361 float size = m_platformData->size(); |
362 int scale = SkiaScalarToHarfBuzzPosition(size); | 362 int scale = SkiaScalarToHarfBuzzPosition(size); |
363 hb_font_set_scale(font, scale, scale); | 363 hb_font_set_scale(font, scale, scale); |
364 hb_font_make_immutable(font); | 364 hb_font_make_immutable(font); |
365 return font; | 365 return font; |
366 } | 366 } |
367 | 367 |
368 } // namespace blink | 368 } // namespace blink |
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